Method and apparatus for measuring a channel status between terminals in a wireless access system that supports cooperative communication

Abstract

A method and device for measuring a channel status between a first user equipment (UE) and a second UE. The method performed by the second UE includes: receiving control information related to a dedicated sounding zone from a base station through at least one of the plurality of downlink subframes, where the dedicated sounding zone is radio resource allocated for receiving a sounding signal; and receiving the sounding signal from the first UE, where the sounding signal is included in an initial symbol of an initial subframe of the plurality of uplink subframes, and where the initial symbol is included in the dedicated sounding zone. The method also includes measuring the channel status between the first UE and the second UE by using the sounding signal; and reporting a result of measurement for the channel status to the base station.

What is claimed is: 
     
       1. A method for measuring a channel status between a first user equipment (UE) and a second UE in a wireless communication system communicating by using a radio frame including a plurality of downlink subframes and a plurality of uplink subframes, which follow the plurality of downlink subframes, the method comprising:
 receiving, by the second UE, control information related to a dedicated sounding zone from a base station through at least one of the plurality of downlink subframes, 
 wherein the dedicated sounding zone is radio resource allocated for receiving a sounding signal; 
 receiving, by the second UE, the sounding signal from the first UE, 
 wherein the sounding signal is included in an initial symbol of an initial subframe of the plurality of uplink subframes, and 
 wherein the initial symbol is included in the dedicated sounding zone; 
 measuring, by the second UE, the channel status between the first UE and the second UE by using the sounding signal; and 
 reporting, by the second UE, a result of measurement for the channel status to the base station, 
 wherein a transition gap is included in a last symbol of the initial subframe of the plurality of uplink subframes. 
 
     
     
       2. The method of  claim 1 , wherein the control information further includes information related to a dedicated sounding sequence for the sounding signal. 
     
     
       3. The method of  claim 2 , wherein the at least one of the plurality of downlink subframes and the plurality of uplink subframes include six or seven OFDM symbols. 
     
     
       4. A cooperative user equipment (UE) for measuring channel status between a source UE and the cooperative UE in a wireless communication system communicating by using a radio frame including a plurality of downlink subframes and a plurality of uplink subframes which follow the plurality of downlink subframes, the cooperative UE comprising:
 a radio communication unit for transmitting and receiving a radio signal; and 
 a controller connected to the radio communication unit and configured to:
 receive control information related to a dedicated sounding zone from a base station through at least one of the plurality of downlink subframe, 
 wherein the dedicated sounding zone is radio resource allocated for receiving a sounding signal, 
 receive the sounding signal from the source UE, 
 wherein the sounding signal is included in an initial symbol of an initial subframe of the plurality of uplink subframes, and 
 wherein the initial symbol is included in the dedicated sounding zone, 
 measure the channel status between the source UE and the cooperative UE by using the sounding signal, and 
 report a result of measurement for the channel status to the base station, 
 wherein a transition gap is included in a last symbol of the initial subframe of the plurality of uplink subframes.